Lhota, a Republican who served as top deputy to former Mayor Rudy Giuliani, also launched his campaign website, Joelhotaformayor.com.

“Since I left my position as chairman and CEO of the MTA just two weeks ago, I’ve been asked over and over, ‘Joe, why do you want to be the mayor of New York City?,’” Lhota said.

“I understand that a lot of politicians will come up with a slick, scripted answer, but my answer is a lot like me: direct and straightforward. I love this city – I love its diversity and optimism, and the opportunity it represents. But the very things I love about New York City are fragile and must be protected,” Lhota said in a “From Joe” message on his Web site.

“In the upcoming weeks and months I look forward to discussing the issues that matter most to you and our fellow New Yorkers and how together we can continue to see New York City thrive.”